Convert crt certificate

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command:

It produced this output:

My web server is (include version):

The operating system my web server runs on is (include version):

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don’t know):

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):

I need a help
Can I change(convert) the certificate created by certbot to X25519?
using openssl and I can’t find command line

Hi @anon52147165

a certificate is read only.

So that's not possible.

For now, no public CA will issue Ed25519 certificates.

You can find the supported key types in Let's Encrypt's CPS (ISRG CPS v2.7 - Let's Encrypt):

RSA with modulus between 2048 and 4096, inclusive; or namedCurve P-256; or namedCurve P-384

You can generate your own certificates, but those won’t be accepted as a valid certificate by browsers.

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